—Why didn’t you come to my party? I was so disappointed at your absence.—I’m very sorry.I_____ but I had a visitor at the last minute.[ ]

Do you know the professor in home we stayed?

can’t _____ his failure.It is unbelievable.

I thought him nice and honest ______ I met her

The time and effort he has devoted during the past few years _____ trees in that village are nowconsidered to be very important. [ ]